Application note: Capzero self-powered ICs — design considerations

The Capzero series of self-powered ICs from Power Integrations is designed to reduce the losses associated with the input filter capacitor discharge resistors when the AC voltage is present. Designed to be connected in series with existing discharge resistors, each Capzero device contains an integrated loss-of-AC detector and back-to-back MOSFETs in an SO-8 package.

Power Integrations

Power Integrations is the leading supplier of high-voltage integrated circuits used in energy-efficient power conversion. The company’s innovative technology enables compact, energy-efficient power supplies in a wide range of electronic products, in AC-DC, DC-DC and LED lighting applications. Since its introduction in 1998, Power Integrations’ EcoSmartä energy-efficiency technology has saved an estimated $4.5 billion of standby energy waste and prevented millions of tons of CO2 emissions. The company’s Green Room web site provides a wealth of information about “energy vampires” and the issue of standby energy waste, along with a comprehensive guide to energy-efficiency standards around the world. Reflecting the environmental benefits of EcoSmart technology, Power Integrations is included in clean-technology stock indices sponsored by the Cleantech Group (Amex: CTIUS) and Clean Edge (Nasdaq: CELS).